Is It True?
#2

Blade has long stopped production of new 400/550 size heli's.
https://www.motionrc.com/collections...rc-helicopters
These guys make some pretty nice "appearance" scale fuse's.....:
http://www.scaleflying.com/Scale-Hel...ages_c_24.html
So do these guys if you are serious...:
http://www.robanmodel.com/site/
#3

Actually blade do still make 400/450 and slightly larger helis, but they have changed the naming convention to reflect the length of the rotor blades rather than the rather meaningless '400/450' designation.
The Traditional '450' used to run 325mm blades. This size heli is now called the Blade 330X: https://www.horizonhobby.com/330x-bnf-basic-p-blh4050
Blade also make a slightly larger 360mm heli in a couple of versions:
Blade 360 CFX 3S : https://www.horizonhobby.com/helicop...asic-p-blh5050
Blade 360 CFX 'Trio' : https://www.horizonhobby.com/helicop...60-cfx-blh4755
But blade have stopped making their larger 500 to 700 size helis. Getting back to the OP's original question, yes they do seem to have dropped all the scale helis from their range.
The Traditional '450' used to run 325mm blades. This size heli is now called the Blade 330X: https://www.horizonhobby.com/330x-bnf-basic-p-blh4050
Blade also make a slightly larger 360mm heli in a couple of versions:
Blade 360 CFX 3S : https://www.horizonhobby.com/helicop...asic-p-blh5050
Blade 360 CFX 'Trio' : https://www.horizonhobby.com/helicop...60-cfx-blh4755
But blade have stopped making their larger 500 to 700 size helis. Getting back to the OP's original question, yes they do seem to have dropped all the scale helis from their range.